Equalizer truck



` April 23, l C., HARBISON 1,710,359

EQUALI ZER TRUCK v Filed Feb. 6, 1928 Patented Apr. 23, 192.9.

Y UNirlEofsfrA TESPATENT QFFICE- CLARENCE B. HARBISON, OF LIMA, OHIO, AssIGNoR `To THE OHIO STEEL( FOUNDNY COMPANY, or' LIMA, oIiIo,fA CORPORATION or OHIO` rnQUALIznn TRUCK. j

Application filed February This invention relates to improvements in railway truck frames and more particu-VVV larly to four-wheelequalized trucks, and has for its principalbbject to provide an im; Vproved construction and arrangementrof the frame and equalizer 'bars lbetween each pair of wheels at opposite sides of the truck, whereby theload is effectively distributed more fully appear. y Y

The invention may best vbe understood by reference to the accompanying drawing in which Figure. 1 is a partial side view of a truck frame constructed in accordance with my invention,

Figure 2 is a section taken on line 2-2 of Figure 1 and Figure 3 is a of Figure 1.

Referring to details shownin the drawings, Figures 1 and 2 show only a fragmeir tary portion of a four-wheel truck including the supporting members for one wheel, but it will be understood that the construction of other portions of the frame is carried out in the same manneras the portions herein shown and described.y l The truck frame includes a side frame 10 and av transverse bolster 11, connected With the opposite side of the lframe member and upon which the car is pivotally supported at its center iii the usual manner. Pedestals 12 aie mounted on the ends of the sideframe detailed section on line members 10, said pedestals, side frame meinbers and transverse bolster all being preferably formed of a hollow single vpiecer casting. The wheels are journalled in the pedestals in the usual manner as indicated in dotted lines.

VA pair of equalizer bars 13, 13, extend in parallel relation on opposite sidesof the pedestals and side frame member, each of said equalizer bars consisting of an upwardly oii'set portion 14C which engages directly on Ythe journal box (not shown), a downwardly extending portion 15 along the inner side of the pedestal 12, and a transverse portion 16 spaced below the side frame member 10. Said equalizer bars are coinpletedat their opposite end by similar downwardly extending portions 15 and offset horizontal portions 14 in supporting engagement with the companion journal box on the same sider of the frame.

in an improved manner, as will hereinafter 6,1928'. sensi No, 252,173.

Anl auxiliary hsuspension bar 17 is mounted between the two main equalizerbars13, 13', and islconnected at opposite ends to said bars. at points adjacent the upwardly extending ,portion 15thereof, closely adjacent the pedestal- V12. In the form shown said lauxiliaryl'iar 17 is connected by means of .a removable pin l8extending through. boss 19 of bar 17, `and the-two bars 13, 13, as clearly.'

shown in 'Figures l and 3. The loadiinposed directly on the frame is carried ontlie axles through a plurality of springs 20, 20, at the center portion of the side frame 10 and resting on the auxiliary bar 17, and

v through the equalizing bars 13, 13, to the journal boxes. In the form shown, the

springs 20, 20, are of the leaf type, although it will be understood that othei' types ofy springs, as for instance coil springs, migh be. utilized at this point if desired.

Among the advantages of a truck constructed as above described is the extreme simplicity of design wherein but single sets of springs .20, 20at .opposite sides of the frame is required, and the load is elfeotively equalized upon all four wheels. It will be observed that the lateral thrusts are mainly taken up by the truck frame itself `thi'ough the side frame members 10 and pedestals 12,

but freedom of relative vertical movement of the equalizer bars 13, 13, and auxiliary bar 17 in a vertical direction is al'orded as said equalizer bars respond to variations of f bars may therefore be of reduced height j adjacent the center and furthermore may be of substantially uniform thickness or width throughout `their length soas to be readily f formed out ofk bar stock, rather than require ing a more massive and complicated structure which otherwise would be required for these parts. This arrangement also permits the truck frame proper to bejacked or raised for replacing the springs or other similar repairs, by withdrawing the'pins 18, 18, which secure the ends of theauxiliary bar 17 between the two equalizer bars 13, 13.

While I have illustrated and described certain embodiments of my invention, it will be understood that I do not wish to be limited to the exact construction shown and described, but that various changes and modiiications may be made without departing from the spirit and scope of my invention.

I claim:

1. In a railway truck, a main frame member incl uding a transverse bolster, side frame members and pedestals integral therewith, a pair of equalizer bars disposed on opposite sides of each o1 Vsaid frame members and having their outer ends in direct supporting engagement with journal boxes on the same side of said frame, said equalizer bars being downwardly oilset along their center portions, and an auxiliary bar disposed between the center portions of each pair of equalizer bars7 and having each of its ends connected to said equalizer bars short of its adjacentpedestal, and Asprings interposed between each of said auxiliary bars and theirrespeetive side frame member thereabove.

2. In a. railway trucl a mainframe member including a transverse bolster, side frame members and pedestals integraltherewith, a pair of equalizer bars disposed on opposite sides of each of said frame members and having their outer ends in vdirect supporting engagement with journal boxes on the same side of said frame, said equalizer bars being downwardly offset valong their center portions, and an auxiliary bar disposed between the center portions of each pair of equalizer bars, and having each of its endsconnected to said equalizer bars short of its adjacent pedestal, and springs interposed between each oi' said. auxiliary bars and their respective side frame member thereabove.

Signed at Lima, Gino, this 1st day of February, 1928.

CLARENCE B. HARBISON. 

